ALLEN BRADLEY 156-C1P20NAD Box
( Brand: Allen Bradley ), ( Manufacturer Part Number: 156-C1P20NAD ), ( Part Type: Box )
Review ALLEN BRADLEY 156c1p20nad In Box
The **Allen-Bradley 156-C1P20NAD** is a high-performance, compact power supply module designed for integration into Rockwell Automation s **CompactLogix** and **ControlLogix** programmable logic controller (PLC) systems, as well as other industrial automation platforms requiring reliable and efficient power distribution. This **20-ampere, single-phase, 24-volt DC power supply** is housed in a robust **156-series box**, featuring a **1U (1.75-inch) height** and a **compact 3.5-inch width**, making it ideal for space-constrained control panels and enclosures. Engineered with **Allen-Bradley s signature quality and durability**, this power supply delivers **clean, regulated DC power** to drive a wide range of industrial devices, including relays, sensors, actuators, and communication modules, ensuring consistent operation even under demanding environmental conditions.
The **156-C1P20NAD** operates at a nominal **24 volts DC**, providing a maximum continuous output current of **20 amperes**, with an optional **overload capacity** of up to **25 amperes for short durations**, making it suitable for applications requiring peak power surges without compromising performance. Its **wide input voltage range of 85 264 volts AC** ensures compatibility with global power standards, while its **efficient power conversion** minimizes heat dissipation, contributing to a longer operational lifespan and reduced cooling requirements in enclosed systems. The module is **fully compliant with industrial safety standards**, including **UL, CSA, and CE certifications**, and is designed to withstand **vibration, shock, and temperature fluctuations** typically encountered in harsh manufacturing, process control, and automation environments.
A key feature of the **156-C1P20NAD** is its **modular and scalable design**, allowing it to be easily integrated into **Allen-Bradley s 156-series power distribution units (PDUs)** or used independently in custom-built control panels. The power supply includes **standard mounting provisions**, such as **screw terminals for secure wiring connections**, along with **clear labeling and color-coded terminals** for positive ( ) and negative ( ) outputs, simplifying installation and troubleshooting. Additionally, it incorporates **built-in protection mechanisms**, including **overcurrent, overvoltage, and short-circuit protection**, to safeguard connected loads and prevent equipment damage. The **156-series box enclosure** provides **IP20 protection**, offering basic dust and water ingress resistance, though additional sealing may be required for applications in highly corrosive or wet environments.
For enhanced system reliability, the **156-C1P20NAD** can be paired with **Allen-Bradley s redundant power supply configurations**, ensuring uninterrupted operation in critical applications. Its **compact yet robust construction** makes it a versatile choice for **machine automation, HVAC control, material handling systems, and industrial process control**, where dependable power delivery is essential. Whether used as a standalone power source or as part of a larger **CompactLogix or ControlLogix system**, this power supply module exemplifies **Allen-Bradley s commitment to performance, efficiency, and long-term durability**, making it a trusted component in modern industrial automation architectures.
### **Pros and Cons of buying a Allen-Bradley 156-C1P20NAD (156C1P20NAD Box)**
#### **Overview**
The **Allen-Bradley 156-C1P20NAD** is a **156 Series CompactLogix PLC (Programmable Logic Controller)** with a **20-point digital I/O configuration**. It is a popular choice for industrial automation due to its reliability, compatibility with Rockwell Automation systems, and modular design. Below is a detailed breakdown of its advantages and disadvantages.
---
### **Pros**
1. **Reliability and Durability**
- Allen-Bradley (now part of Rockwell Automation) is a well-established brand with a strong reputation for industrial-grade hardware.
- The **156 Series** is designed for harsh environments, with robust enclosure options (NEMA 1, 4, 4X, etc.) and resistance to temperature fluctuations, vibration, and electrical noise.
- Long-term availability of parts and support, reducing long-term maintenance risks.
2. **Compatibility with Rockwell Ecosystem**
- Fully integrated with **Studio 5000**, **RSLogix 5000**, and **FactoryTalk View** software, making programming and monitoring seamless.
- Supports **EtherNet/IP**, **CIP (Common Industrial Protocol)**, and other Rockwell communication standards, ensuring easy integration with HMIs, drives, and other PLCs.
- Works with **Allen-Bradley PowerFlex drives, servo motors, and safety systems**, expanding automation capabilities.
3. **Modular and Expandable Design**
- The **156 Series** allows for easy expansion via **1762 I/O modules** (digital, analog, high-speed counters, etc.), making it adaptable to different application sizes.
- The **156-C1P20NAD** comes with **20 digital I/O points (16 DI 4 DO)**, which is sufficient for many small to medium control applications. Additional I/O can be added as needed.
- Supports **remote I/O (1769-L30ERM)** for distributed control setups.
4. **Energy Efficiency and Cost Savings**
- The **CompactLogix** series is known for lower power consumption compared to some legacy PLCs, reducing operational costs.
- Long-term cost savings due to reduced downtime and maintenance needs.
5. **Ease of Programming and Maintenance**
- **Studio 5000** provides a user-friendly interface for ladder logic, structured text, and other programming languages.
- **Remote diagnostics** via **FactoryTalk AssetCentre** help in predictive maintenance, reducing unexpected failures.
- **Cloud connectivity options** (via **FactoryTalk IoT Edge**) allow for remote monitoring and updates.
6. **Good Performance for Small to Medium Applications**
- Suitable for **machine control, process automation, packaging, material handling, and simple motion control**.
- Faster scan times compared to some micro PLCs, making it efficient for applications requiring real-time responses.
7. **Second-Hand and Refurbished Availability**
- Since the **156 Series** is an older but still widely used model, **refurbished or used units** are often available at a lower cost, extending its cost-effectiveness.
---
### **Cons**
1. **Outdated Compared to Newer Models**
- The **156 Series** was introduced in the **2000s** and has been largely replaced by the **CompactLogix 1769 (L30E, L32E, etc.)** and **Micro800** series.
- **Newer models (e.g., 1769-L30ERM)** offer **higher I/O counts, better Ethernet/IP performance, and support for more advanced protocols** (e.g., OPC UA).
- **Studio 5000** is still supported, but **FactoryTalk Linx** (for newer PLCs) offers more modern features like **edge computing and AI integration**.
2. **Limited I/O in Base Model**
- The **156-C1P20NAD** only comes with **20 digital I/O points**, which may be insufficient for larger applications requiring **analog inputs/outputs, high-speed counters, or specialized modules**.
- Additional I/O requires **extra modules**, increasing the overall cost.
3. **No Built-in Safety Functionality**
- Unlike newer **CompactLogix 1769 models with safety certifications**, the **156 Series** does not natively support **safety-rated I/O (e.g., 1769-IA16S)**.
- Safety applications require **external safety relays or third-party safety PLCs**, adding complexity.
4. **Slower Processing Compared to Modern PLCs**
- While still capable for many tasks, **newer CompactLogix (1769) and Micro800** models offer **faster scan speeds, better memory management, and support for more advanced motion control**.
- Some applications requiring **high-speed data acquisition or complex math operations** may struggle with the **156 Series**.
5. **Limited Analog Support**
- The **156-C1P20NAD** is purely digital. For analog applications, **additional 1762-AI16DI or 1762-AO16DO modules** are required, increasing cost and complexity.
- Newer models (e.g., **1769-L32E**) include **built-in analog I/O**, simplifying setup.
6. **Deprecation of Some Features in Newer Software**
- While **RSLogix 5000** still supports the **156 Series**, some **advanced features (e.g., better tag-based programming, improved Ethernet/IP performance)** are more accessible in newer software versions.
- **FactoryTalk View Studio** (for HMI) may require additional configuration for seamless integration with older PLCs.
7. **Higher Long-Term Costs for Upgrades**
- If the application grows, **migrating to a newer PLC (e.g., 1769-L32E)** may be necessary, leading to **additional training costs, software licensing, and potential downtime**.
- **Cloud and IoT integration** is more robust with newer models, limiting future scalability.
8. **Limited Global Support for Newer Technologies**
- **5G, edge computing, and AI-driven predictive maintenance** are better supported in **modern PLCs** (e.g., **Micro800 with FactoryTalk IoT Edge**).
- The **156 Series** lacks built-in support for **OPC UA over TCP/IP**, which is becoming a standard in Industry 4.0 applications.
---
### **Conclusion**
The **Allen-Bradley 156-C1P20NAD** remains a **reliable, cost-effective choice for small to medium industrial control applications**, particularly in environments where **Rockwell Automation ecosystem integration** is critical. Its **durability, ease of programming, and compatibility with legacy systems** make it a practical option for **existing installations or applications with limited I/O requirements**.
However, for **new projects or applications requiring higher I/O counts, analog support, safety functionality, or future scalability**, a **newer CompactLogix (1769) or Micro800 PLC** would be a **better long-term investment**. The **156 Series is best suited for:**
- **Replacing older PLCs in existing systems** where compatibility is essential.
- **Simple digital control applications** (e.g., machine sequencing, basic automation).
- **Budget-conscious buyers** who prioritize **proven reliability over cutting-edge features**.
If **cost is not a major concern and future-proofing is important**, investing in a **modern CompactLogix (e.g., 1769-L32E) or Micro800** would provide **better performance, expandability, and support for emerging industrial technologies**.
---
### **Final Recommendation**
- **Buy the 156-C1P20NAD if:**- You are **replacing an older Allen-Bradley PLC** and need **immediate compatibility**.
- Your application requires **only 20 digital I/O points** with no analog or high-speed needs.
- You are working within a **tight budget** and can accept **limited future expansion**.
- The system will **not require advanced safety, motion control, or cloud integration**.
- **Consider a newer model (e.g., 1769-L32E or Micro800) if:**- You need **higher I/O counts, analog support, or safety functionality**.
- The application may **grow in complexity** in the next 5 10 years.
- You want **better Ethernet/IP performance, OPC UA support, or cloud connectivity**.
- Long-term **maintenance and scalability** are priorities.
For **most new installations**, a **CompactLogix 1769 or Micro800** offers **better value, flexibility, and future compatibility**, despite a slightly higher upfront cost. The **156 Series remains a solid choice only for specific legacy or cost-constrained scenarios**.
Details:
The product is used surplus. All products are guaranteed to be working but may show signs of use. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Call to use a shipping service other than the ones listed.
part #: 156c1p20nad prices
- $108.00-$120.00
specifications automationjack:
- brand: Allen Bradley
- mpn: 156-c1p20nad
- part type: Box
general automationjack:
- condition: Seller refurbished
- Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment
seller automationjack:
- # reviews: 197590
- city: 1 Millennium Dr, Willingboro, NJ 08046
- rating: 99.6%
offer automationjack:
- sold: 0
- options: Ship-to-home
- started: April 3, 2026
- availability: In Stock
- quantity: 6
shipping automationjack:
- type: Fixed
- transit: 3-6 Days
- service: Standard
- class: Standard
- cost: $12.90
payments automationjack:
- other
- credit card: Diners-club
- wallet: Apple-pay
returns automationjack:
- policy: Returns Accepted
- time: 30 Days
- paid by: Buyer
- method: Money back
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